I realise I should have posted about how the biogas system is working a while ago, but…better late than never.
The system took a while to produce gas, it sat for weeks looking sad and deflated, even though I fed it a bucket of horse manure every day for the first week.
Eventually the weather got warm enough and the microbes in the tank woke up and started to feed. The gas holder slowly filled up until it was just over half full. I really wanted to try out the burner to see if we have methane in the tank or just carbon dioxide (which is apparently common in the first few months).
We connected the gas line to the stove that came with the kit as soon as the gas holding…balloon? (I’m not sure what to call the thing that holds the gas) got to almost full.
The first lighting of the flame ; this was a momentous occasion. We lit the flame and it just hissed at us for a few seconds, then an almost invisible blue flame was born. We boiled the kettle for the washing up in about 5 minutes and celebrated with a coffee…then I made soy milk…and my daughter made a stew…and so on.
The gas balloon went down a lot in that first afternoon as we used the burner constantly (that’s what you do with new toys isn’t it?). After that I went back to feeding the system a bucket of manure every day. The colder weather certainly slows down the gas production and we don’t have enough gas to use as our only supply just yet. Once the toilet is connected to the system the feeding of the digester will hopefully take care of itself.
I am sold on biogas; even though the initial set up of the bacterial colonies takes so long (especially in Winter) and the refill time is fairly long at first, the system works and is improving daily.